This means that the internal power supply of the SBC has detected an overload or even short-circuit condition on one of its power rails.

Please follow the steps below:

Disconnect the power, wait 10 seconds, then reconnect the power again.

If this doesn't help, disconnect the power, remove all cables and/or add-on cards (especially the ones which may have been recently installed or changed) except the power cord and reconnect the power again.

If there is no blinking RESET LED, try to isolate the culprit by reconnecting / reinstalling all the previously disconnected / removed items one after the other.

If the problem persists, the system needs most probably to be returned to MPL for a detailed analysis.

No, not yet. However, when using an adapted kernel, the armel port of Debian wheezy works perfectly on the CEC4. If you want to install Debian yourself, please contact MPL AG for suitable kernel packages and an installer image for Debian wheezy. We are working towards inclusion of the CEC 4 in the next Debian iteration, though.